The Transactions of the Korean Institute of Electrical Engineers P (전기학회논문지P)

The Korean Institute of Electrical Engineers (대한전기학회)
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An Adaptive Contrast Enhancement Method using Dynamic Range Segmentation for Brightness Preservation

밝기 보존을 위한 동적 영역 분할을 이용한 적응형 명암비 향상기법

  • 박규희 (한양대학교 전자전기제어공학과) ;
  • 조화현 (한양대학교 전자전기제어공학과) ;
  • 이승준 (한양대학교 전자전기제어공학과) ;
  • 윤종호 (한양대학교 전자전기제어공학과) ;
  • 최명렬 (한양대학교 전자전기제어공학과)
  • Published : 2008.03.01
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Abstract

In this paper, we propose an adaptive contrast enhancement method using dynamic range segmentation. Histogram Equalization (HE) method is widely used for contrast enhancement. However, histogram equalization method is not suitable for commercial display because it may cause undesirable artifacts due to the significant change in brightness. The proposed algorithm segments the dynamic range of the histogram and redistributes the pixel intensities by the segment area ratio. The proposed method may cause over compressed effect when intensity distribution of an original image is concentrated in specific narrow region. In order to overcome this problem, we introduce an adaptive scale factor. The experimental results show that the proposed algorithm suppresses the significant change in brightness and provides wide histogram distribution compared with histogram equalization.

Keywords

References

  1. R. C. Gonzalez, "Digital Image Processing", 2nd Edition, Prentice Hall, pp. 75-146, 2002
  2. R. Crane, "A Simplified Approach to Image Processing", Prentice Hall, pp. 42-66, 1997
  3. 조화현, 최명렬, "실시간 처리를 위한 적응형 콘트라스트 향상 기법", 대한전자공학회, 전자공학회논문지, 제 42권, SP 제 1호, pp. 51-57, 2005
  4. Z. Chen, et al., "Gray-Level Grouping (GLG) : An Automatic Method for Optimized Image Contrast Enhancement - Part1 : The Basic Method", IEEE Transactions on Image processing, vol. 15, no. 8, pp. 2290-2302, 2006
  5. H. Hayashi, et al., "Contrast Improvement for Displayed Color Image Based on Color Difference", IDW '06 VHF, pp. 531-534, 2006
  6. Y. T. Kim, et al., "Contrast enhancement using brightness preserving bi-histogram equalization", IEEE Trans. on Consumer Electron, vol. 43, no. 1, pp. 1-8, 1997 https://doi.org/10.1109/30.580378
  7. J. Y. Kim, et al., "An Advanced Contrast Enhancement Using Partially Overlapped Sub-Block Histogram Equalization", IEEE Trans. on Circuit and Systems, vol. 11, no. 4, pp. 475-484, 2005
  8. S. D. Chen, et al., "Contrast Enhancement using Recursive Mean-Separate Histogram Equalization for Scalable Brightness Preservation", IEEE Trans. on Consumer Electron, vol. 49, no. 4, pp. 1301-1309, 2003 https://doi.org/10.1109/TCE.2003.1261233